1 /*****************************************************************************
2 * intf.c : audio output API towards the interface modules
3 *****************************************************************************
4 * Copyright (C) 2002-2007 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
35 #include <stdlib.h> /* calloc(), malloc(), free() */
39 #include "aout_internal.h"
41 #include <vlc_playlist.h>
43 static aout_instance_t *findAout (vlc_object_t *obj)
45 input_thread_t *(*pf_find_input) (vlc_object_t *);
47 pf_find_input = var_GetAddress (obj, "find-input-callback");
48 if (unlikely(pf_find_input == NULL))
51 input_thread_t *p_input = pf_find_input (obj);
55 aout_instance_t *p_aout = input_GetAout (p_input);
56 vlc_object_release (p_input);
59 #define findAout(o) findAout(VLC_OBJECT(o))
64 * The hardware volume cannot be set if the output module gets deleted, so
65 * we must take the mixer lock. The software volume cannot be set while the
66 * mixer is running, so we need the mixer lock (too).
68 * Here is a schematic of the i_volume range :
70 * |------------------------------+---------------------------------------|
73 * Between 0 and pi_soft, the volume is done in hardware by the output
74 * module. Above, the output module will change p_aout->mixer.i_multiplier
75 * (done in software). This scaling may result * in cropping errors and
76 * should be avoided as much as possible.
78 * It is legal to have *pi_soft == 0, and do everything in software.
79 * It is also legal to have *pi_soft == 1024, and completely avoid
80 * software scaling. However, some streams (esp. A/52) are encoded with
81 * a very low volume and users may complain.
91 /*****************************************************************************
92 * doVolumeChanges : handle all volume changes. Internal use only to ease
94 *****************************************************************************/
96 int doVolumeChanges( unsigned action, vlc_object_t * p_object, int i_nb_steps,
97 audio_volume_t i_volume, audio_volume_t * i_return_volume,
100 int i_result = VLC_SUCCESS;
101 int i_volume_step = 1, i_new_volume = 0;
102 bool b_var_mute = false;
103 aout_instance_t *p_aout = findAout( p_object );
105 if ( p_aout ) aout_lock_volume( p_aout );
107 b_var_mute = var_GetBool( p_object, "volume-muted");
109 const bool b_unmute_condition = ( /* Also unmute on increments */
110 ( action == INCREMENT_VOLUME )
111 || /* On explicit unmute */
112 ( ( action == SET_MUTE ) && ( b_var_mute && !b_mute ) )
113 || /* On toggle from muted */
114 ( ( action == TOGGLE_MUTE ) && b_var_mute ) );
116 const bool b_mute_condition = ( !b_var_mute
118 ( ( action == SET_MUTE ) && b_mute )
120 ( action == TOGGLE_MUTE )
124 if ( b_unmute_condition )
126 /* Restore saved volume */
127 i_volume = var_GetInteger( p_object, "saved-volume" );
128 var_SetBool( p_object, "volume-muted", false );
130 else if ( b_mute_condition )
132 /* We need an initial value to backup later */
133 i_volume = config_GetInt( p_object, "volume" );
136 if ( action == INCREMENT_VOLUME )
138 i_volume_step = var_InheritInteger( p_object, "volume-step" );
140 if ( !b_unmute_condition )
141 i_volume = config_GetInt( p_object, "volume" );
143 i_new_volume = (int) i_volume + i_volume_step * i_nb_steps;
145 if ( i_new_volume > AOUT_VOLUME_MAX )
146 i_volume = AOUT_VOLUME_MAX;
147 else if ( i_new_volume < AOUT_VOLUME_MIN )
148 i_volume = AOUT_VOLUME_MIN;
150 i_volume = i_new_volume;
153 var_SetInteger( p_object, "saved-volume" , i_volume );
156 if ( b_mute_condition )
158 i_volume = AOUT_VOLUME_MIN;
159 var_SetBool( p_object, "volume-muted", true );
162 /* Commit volume changes */
163 config_PutInt( p_object, "volume", i_volume );
167 aout_lock_mixer( p_aout );
168 aout_lock_input_fifos( p_aout );
169 if ( p_aout->p_mixer )
170 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
171 aout_unlock_input_fifos( p_aout );
172 aout_unlock_mixer( p_aout );
175 /* trigger callbacks */
176 var_TriggerCallback( p_object, "volume-change" );
179 var_SetBool( p_aout, "intf-change", true );
180 aout_unlock_volume( p_aout );
181 vlc_object_release( p_aout );
184 if ( i_return_volume != NULL )
185 *i_return_volume = i_volume;
189 #undef aout_VolumeGet
190 /*****************************************************************************
191 * aout_VolumeGet : get the volume of the output device
192 *****************************************************************************/
193 int aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
196 aout_instance_t * p_aout = findAout( p_object );
198 if ( pi_volume == NULL ) return -1;
200 if ( p_aout == NULL )
202 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
206 aout_lock_volume( p_aout );
207 aout_lock_mixer( p_aout );
208 if ( p_aout->p_mixer )
210 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
214 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
216 aout_unlock_mixer( p_aout );
217 aout_unlock_volume( p_aout );
219 vlc_object_release( p_aout );
223 #undef aout_VolumeSet
224 /*****************************************************************************
225 * aout_VolumeSet : set the volume of the output device
226 *****************************************************************************/
227 int aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
229 return doVolumeChanges( SET_VOLUME, p_object, 1, i_volume, NULL, true );
233 /*****************************************************************************
234 * aout_VolumeUp : raise the output volume
235 *****************************************************************************
236 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
238 *****************************************************************************/
239 int aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
240 audio_volume_t * pi_volume )
242 return doVolumeChanges( INCREMENT_VOLUME, p_object, i_nb_steps, 0, pi_volume, true );
245 #undef aout_VolumeDown
246 /*****************************************************************************
247 * aout_VolumeDown : lower the output volume
248 *****************************************************************************
249 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
251 *****************************************************************************/
252 int aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
253 audio_volume_t * pi_volume )
255 return aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
258 #undef aout_ToggleMute
259 /*****************************************************************************
260 * aout_ToggleMute : Mute/un-mute the output volume
261 *****************************************************************************
262 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
263 * function (muted => 0).
264 *****************************************************************************/
265 int aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
267 return doVolumeChanges( TOGGLE_MUTE, p_object, 1, 0, pi_volume, true );
270 /*****************************************************************************
271 * aout_IsMuted : Get the output volume mute status
272 *****************************************************************************/
273 bool aout_IsMuted( vlc_object_t * p_object )
276 aout_instance_t * p_aout = findAout( p_object );
277 if ( p_aout ) aout_lock_volume( p_aout );
278 b_return_val = var_GetBool( p_object, "volume-muted");
281 aout_unlock_volume( p_aout );
282 vlc_object_release( p_aout );
287 /*****************************************************************************
288 * aout_SetMute : Sets mute status
289 *****************************************************************************
290 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
291 * function (muted => 0).
292 *****************************************************************************/
293 int aout_SetMute( vlc_object_t * p_object, audio_volume_t * pi_volume,
296 return doVolumeChanges( SET_MUTE, p_object, 1, 0, pi_volume, b_mute );
300 * The next functions are not supposed to be called by the interface, but
301 * are placeholders for software-only scaling.
304 /* Meant to be called by the output plug-in's Open(). */
305 void aout_VolumeSoftInit( aout_instance_t * p_aout )
309 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
310 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
312 i_volume = config_GetInt( p_aout, "volume" );
313 if ( i_volume < AOUT_VOLUME_MIN )
315 i_volume = AOUT_VOLUME_DEFAULT;
317 else if ( i_volume > AOUT_VOLUME_MAX )
319 i_volume = AOUT_VOLUME_MAX;
322 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
325 /* Placeholder for pf_volume_get(). */
326 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
328 *pi_volume = p_aout->output.i_volume;
333 /* Placeholder for pf_volume_set(). */
334 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
336 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
337 p_aout->output.i_volume = i_volume;
342 * The next functions are not supposed to be called by the interface, but
343 * are placeholders for unsupported scaling.
346 /* Meant to be called by the output plug-in's Open(). */
347 void aout_VolumeNoneInit( aout_instance_t * p_aout )
349 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
350 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
353 /* Placeholder for pf_volume_get(). */
354 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
356 (void)p_aout; (void)pi_volume;
360 /* Placeholder for pf_volume_set(). */
361 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
363 (void)p_aout; (void)i_volume;
369 * Pipelines management
372 /*****************************************************************************
373 * aout_Restart : re-open the output device and rebuild the input and output
375 *****************************************************************************
376 * This function is used whenever the parameters of the output plug-in are
377 * changed (eg. selecting S/PDIF or PCM).
378 *****************************************************************************/
379 static int aout_Restart( aout_instance_t * p_aout )
384 aout_lock_mixer( p_aout );
386 if ( p_aout->i_nb_inputs == 0 )
388 aout_unlock_mixer( p_aout );
389 msg_Err( p_aout, "no decoder thread" );
393 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
395 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
396 aout_lock_input_fifos( p_aout );
397 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
398 aout_unlock_input_fifos( p_aout );
401 /* Lock all inputs. */
402 aout_lock_input_fifos( p_aout );
403 aout_MixerDelete( p_aout );
405 /* Re-open the output plug-in. */
406 aout_OutputDelete( p_aout );
408 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
410 /* Release all locks and report the error. */
411 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
413 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
415 aout_unlock_input_fifos( p_aout );
416 aout_unlock_mixer( p_aout );
420 if ( aout_MixerNew( p_aout ) == -1 )
422 aout_OutputDelete( p_aout );
423 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
425 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
427 aout_unlock_input_fifos( p_aout );
428 aout_unlock_mixer( p_aout );
432 /* Re-open all inputs. */
433 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
435 aout_input_t * p_input = p_aout->pp_inputs[i];
436 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
437 p_input->b_changed = 1;
438 aout_unlock_input( p_aout, p_input );
441 aout_unlock_input_fifos( p_aout );
442 aout_unlock_mixer( p_aout );
447 /*****************************************************************************
448 * aout_FindAndRestart : find the audio output instance and restart
449 *****************************************************************************
450 * This is used for callbacks of the configuration variables, and we believe
451 * that when those are changed, it is a significant change which implies
452 * rebuilding the audio-device and audio-channels variables.
453 *****************************************************************************/
454 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
455 vlc_value_t oldval, vlc_value_t newval, void *p_data )
457 aout_instance_t * p_aout = findAout( pl_Get(p_this) );
459 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
460 if ( p_aout == NULL ) return VLC_SUCCESS;
462 var_Destroy( p_aout, "audio-device" );
463 var_Destroy( p_aout, "audio-channels" );
465 aout_Restart( p_aout );
466 vlc_object_release( p_aout );
471 /*****************************************************************************
472 * aout_ChannelsRestart : change the audio device or channels and restart
473 *****************************************************************************/
474 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
475 vlc_value_t oldval, vlc_value_t newval,
478 aout_instance_t * p_aout = (aout_instance_t *)p_this;
479 (void)oldval; (void)newval; (void)p_data;
481 if ( !strcmp( psz_variable, "audio-device" ) )
483 /* This is supposed to be a significant change and supposes
484 * rebuilding the channel choices. */
485 var_Destroy( p_aout, "audio-channels" );
487 aout_Restart( p_aout );
491 #undef aout_EnableFilter
492 /** Enable or disable an audio filter
493 * \param p_this a vlc object
494 * \param psz_name name of the filter
495 * \param b_add are we adding or removing the filter ?
497 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
500 aout_instance_t *p_aout = findAout( p_this );
502 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
505 AoutInputsMarkToRestart( p_aout );
509 vlc_object_release( p_aout );